Notes 2.4

Outline

Devices that Monitor Faults

• there are four kinds of devices
  • creep meter
    • measures movement of fault (left to right)
    • uses a wire stretched from one plate to another
  • laser - ranging device
    • measures movement of fault (left to right)
    • uses laser
  • water - tube tiltmeter (tiltmeter)
    • measures tilting of the ground
    • uses water
  • satellite monitors
    • uses radar to map the fault movement

Monitoring Risk in the United States

• eventhough there are so many gadgets, geologists still can't predict exactlly when a earthquake can strike
• geologists can resolve risks by mapping where faults are active